All of a Sudden

All of a Sudden (French: Soudain, lit. 'Suddenly'; Japanese: 急に具合が悪くなる, romanized: Kyū ni guai ga waruku naru, lit. 'Suddenly Feeling Unwell') is a 2026 drama film directed by Ryusuke Hamaguchi, in his French-language debut. Co-written by Hamaguchi and Léa Le Dimna, it is loosely based on the non-fiction book You and I – The Illness Suddenly Get Worse by Makiko Miyano and Maho Isono. It stars Virginie Efira and Tao Okamoto. The film is a co-production between France, Japan, Germany and Belgium. All of a Sudden had its world premiere at the main competition of the 2026 Cannes Film Festival on 15 May, where it was nominated for the Palme d'Or. It will be theatrically released in Japan by Bitters End on 19 June, and in France by Diaphana Distribution on 12 August.